The product description above said these ears are made of silicone. Now it says "Imported non-toxic PPL environmental protection material with no odor." The package clearly says they are made of LATEX. Other reviewers have pointed this out as well. Although I don't have any allergies, some potential customers may. The suit's ears are lightweight and sit directly on top of the real ears, while extensions wrap around the real ears to keep the suit's ears in place. My suit's ears would probably stay in place much better if I wasn't wearing glasses. The arms of my glasses and the appendages of these ears occupy the same space behind my real ears. As a result, the suit's ears kept slipping off. If I wear them again I will try the eyelash glue as suggested in the product description.